Pesticides for Powdery Mildew (Peaches and Nectarines)

Stage of Development: Husk Fall
Recommended Product Choices Grp1 Amount per REI2 PHI3 (days) Precautions and Notes
Ha Acre
sulphur (Cosavet DF Edge 31869, Kumulus 18836)M27.0 kg2.8 kg24 h1Apply at husk fall and again at 2 weeks.
quinoxyfen (Quintec) 2975513500 mL200 mL12 h7Apply before visible symptoms, and at 10-14 day intervals. Do not make more than 2 consecutive applications.
myclobutanil (Nova 40WP) 223993340 g140 g12 h – 12 days1Limit use of group 3 fungicides (Indar, Nova, Topas, Jade, Tilt, Quash) to 2 sprays/season. Rotate with fungicides from different groups. 12 days REI for thinning.
penthiopyrad (Fontelis) 3033171.0-1.75 L405-709 mL12 h0Do not apply more than 2 times per season. Use high rate for high disease pressure.
boscalid + pyraclostrobin (Pristine WG) 279857 + 11750 g - 1 kg304 g - 405 gdry – 12 days0Limit sprays of class 11 fungicides to 2 per season for resistance management. 10 days REI for thinning.
trifloxystrobin (Flint) 3061911140-280 g57-113 g12 h – 4 days1Suppression only. Use the higher rate for high disease pressure. Limit sprays of Group 11 fungicides (Flint, Cabrio, Pristine) to 2 per season. 4 days REI for thinning.
mineral oil (Purespray Green) 27666NC10 L4 L12 h0For suppression of powdery mildew, apply in a minimum of 1000 L water/ha at 10-14 day intervals. Do not use in combination with or within 14 days of sulphur or captan.
potassium bicarbonate (MilStop) 28095NC2.8-5.6 kg1.1-2.2 kg4 h0Suppression only. Do not mix with other pesticides or fertilizers.
metrafenone (Vivando) 29765U8750 mL - 1.12 L304 - 453 mL12 h7Apply prior to onset of disease and at 14-21 day intervals. Maximum of 2 sprays/season.
metconazole (Quash 30402)3245-280 g99-113 g12h - 9 days14Suppression of powdery mildew only. Maximum one application/season. REI of 9 days is for thinning.
fluopyram + trifloxystrobin (Luna Sensation) 321077+11300-400 mL121-162 mL12 h1 dayUse higher rate for high disease pressure. Rotate with fungicides from other groups. Limit use of group 11 fungicides to 2 applications per season.
Notes: Rotate fungicides from different groups for resistance management.

Stage of Development: Husk Fall

Powdery Mildew (Peaches and Nectarines)

11 Product Choices

1 Notes

Applications and Notes »  Pest Info »

1Group number for resistance management. NC = not classified.
2Re-entry interval on the label. An asterisk(*) indicates that no re-entry is shown on the label, but the WorkSafe BC re-entry interval may apply and is shown.
3Pre-harvest interval. Note: always read and follow the directions on the pesticide label.